Lansford, L., & Lewis Lansford. (2014). Unlock: Listening and speaking skills. Cambridge: Cambridge University Press.
शिकागो स्टाइल उद्धरणLansford, Lewis, और Lewis Lansford. Unlock: Listening and Speaking Skills. Cambridge: Cambridge University Press, 2014.
एमएलए उद्धरणLansford, Lewis, और Lewis Lansford. Unlock: Listening and Speaking Skills. Cambridge: Cambridge University Press, 2014.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.